body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont;
  background: #0b0e17;
  color: #eaeaf0;
}

a { color: inherit; text-decoration: none; }

.topbar {
  display: flex;
  justify-content: space-between;
  padding: 16px 40px;
  background: #0f1320;
  border-bottom: 1px solid #1c2235;
}

.logo {
  font-weight: 600;
  letter-spacing: 1px;
}

nav a {
  margin-left: 20px;
  color: #9aa4bf;
}

nav a.cta {
  color: #fff;
  border: 1px solid #3a7afe;
  padding: 6px 14px;
  border-radius: 6px;
}

.hero {
  padding: 100px 40px;
  text-align: center;
}

.hero h1 {
  font-size: 48px;
}

.hero p {
  color: #9aa4bf;
}

.btn {
  display: inline-block;
  padding: 12px 24px;
  background: #3a7afe;
  color: #fff;
  border-radius: 8px;
  margin: 10px;
}

.btn.secondary {
  background: transparent;
  border: 1px solid #3a7afe;
}

.section {
  padding: 80px 40px;
}

.section.dark {
  background: #0f1320;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit,minmax(220px,1fr));
  gap: 20px;
}

.card {
  background: #14192b;
  padding: 24px;
  border-radius: 12px;
}

.center {
  text-align: center;
}

footer {
  text-align: center;
  padding: 40px;
  color: #6f7aa8;
}